[Paraview-developers] Selective sending of Field data to Paraview VCR based on user request

[sumeet kumar]

Thank you Cory,

Yeah, the only best option seems available is to support selecting which
arrays are loaded by the reader.

But, I just want to let you know that I think  VISIT's  *avtvisit
FileFormat* supports this.


Sumeet



On Fri, Aug 12, 2016 at 8:50 AM, Cory Quammen <cory.quammen at kitware.com>
wrote:

> Sumeet,
>
> Please include the list with your reply so that others may participate in
> the conversation.
>
> It is possible at the reader level to specify which arrays are loaded
> through the reader properties panel. See the VTU and Exodus II file readers
> in ParaView, for example. However, any unloaded arrays will not be
> displayed in the Color By combobox.
>
> At present, I do not believe it is possible to do what you are asking
> without some significant source code changes within ParaView. For example,
> support for consumers to request subsets of data arrays from producers,
> like your reader, would need to be added. That's a fairly heavy lift.
>
> Your best bet for now is probably to support selecting which arrays are
> loaded by your reader. See the xml description for
> XMLUnstructuredGridReaderCore in
>
> paraview/ParaViewCore/ServerManager/SMApplication/Resources/readers.xml
>
> for an example of how to set this up.
>
> HTH,
> Cory
>
>
> On Wed, Aug 10, 2016 at 1:05 PM, sumeet kumar <sumeet.kumar507 at gmail.com>
> wrote:
>
>> Hey Cory,
>>
>> Currently I am doing this from my reader.
>>
>>     Node_Mesh->GetPointData()->AddArray(Generalized_Displacements);
>>     Node_Mesh->GetPointData()->AddArray(Node_Tag);
>>     Node_Mesh->GetCellData()->AddArray(Element_Tag);
>>     Node_Mesh->GetCellData()->AddArray(Material_Tag);
>>     Node_Mesh->GetPointData()->AddArray(Elastic_Strain);
>>     Node_Mesh->GetPointData()->AddArray(Plastic_Strain);
>>     Node_Mesh->GetPointData()->AddArray(Stress);
>> Which means I am sending all field data
>> *Generalized_Displacemnts , Node_Tag, Element_Tag, Material_tag,
>> Elastic_Strain ........ *
>> Now suppose, in Paraview, user selects field_data  *Generalized
>> Displacements *.to visualize.
>>
>> Currently, I am sending all the field data associated with that mesh as
>> stated above. In order to be efficient, I want to send only
>> *Generalized_Displacements* in the next time step.
>> But at the same time, I want that the user should be able to see all the
>> field datasets, so that if he changes his mind and select other field
>> dataset to visualize, I would get a request and send the same data.
>>
>> In other words, I want to respond to the events when (the choice of field
>> data to visualize is changed), so that i can send that field data only.
>> But, The user should be able to view other field data options, so that
>> they can change the request what they want to visualize.
>> Basically, I want to respond to this event as shown below
>>
>> [image: Inline image 2]
>>
>>
>> Sumeet
>>
>>
>> On Wed, Aug 10, 2016 at 8:24 AM, Cory Quammen <cory.quammen at kitware.com>
>> wrote:
>>
>>> Sumeet,
>>>
>>> Could you clarify what you mean by "sending data to ParaView"?
>>>
>>> Thanks,
>>> Cory
>>>
>>> On Wed, Aug 10, 2016 at 2:58 AM, sumeet kumar <sumeet.kumar507 at gmail.com
>>> > wrote:
>>>
>>>> Hello all,
>>>>
>>>> I have a unstructured mesh with many fields like Displacements,
>>>> velocity, Stresses, Strains, Material no.. etc either on nodes or on cell.
>>>> Currently, I associate all the field data arrays with my unstructured mesh
>>>> and send it to ParaView for visualization and it works great..
>>>>
>>>> But, now, since I have many field data and the mesh can be also very
>>>> large. Sending all data at once would be very *slow and in-efficient.*
>>>>
>>>> What I want is the following:
>>>>
>>>>    - I want that based on user request I should send attach that field
>>>>    data only. For example in the ParaView, if the User selects Displacements
>>>>    to Visualize, I should some how know that and only send displacements and
>>>>    similarly.
>>>>    - Also, I want that the user should be able to see all the
>>>>    different field data options I have, so that he can select and ask for as
>>>>    it is done normally .
>>>>    - I also, want that if the user selects a filter like, *wrap by
>>>>    vector *with displacements and chooses to see stress, ParaView
>>>>    should generate requests for *displacements and stresses so that I
>>>>    can send them.*
>>>>
>>>> I would be really thankfull, if someone could answer my queries.
>>>>
>>>>
>>>> Sumeet Kumar Sinha
>>>> Graduate Student
>>>> Phone: (+1)  <%28%2B91%29%209910516219>5306018271
>>>> Website : http://www.sumeetsinha.in/
>>>>
>>>
>>>
>>>
>>> --
>>> Cory Quammen
>>> R&D Engineer
>>> Kitware, Inc.
>>>
>>
>>
>>
>> --
>>
>> Sumeet Kumar Sinha
>> Graduate Student
>> Phone: (+1)  <%28%2B91%29%209910516219>5306018271
>> Website : http://www.sumeetsinha.in/
>>
>
>
>
> --
> Cory Quammen
> R&D Engineer
> Kitware, Inc.
>



-- 

Sumeet Kumar Sinha
Graduate Student
Phone: (+1)  <%28%2B91%29%209910516219>5306018271
Website : http://www.sumeetsinha.in/
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